前沿：公司使用的CI框架，以前上学的时候没有接触过，对国外的优秀框架，几乎都没了解过，（英语是硬伤）。最近在接触学习CI框架，把学习成果，分享下：
1.下载最新的CI框架：
http://codeigniter.org.cn/download
2.解压到web根目录，
/Users/jason/project/ci/
3.目录文件列表
Ray-2:ci ray$ ll
total 24
drwxr-xr-x@ 7 ray staff 238 10 8 2012 .
drwxr-xr-x 7 root admin 238 6 14 09:45 ..
drwxr-xr-x@ 17 ray staff 578 10 8 2012 application
-rw-r--r--@ 1 ray staff 6357 10 8 2012 index.php
-rw-r--r--@ 1 ray staff 2496 10 8 2012 license.txt
drwxr-xr-x@ 10 ray staff 340 10 8 2012 system
drwxr-xr-x@ 17 ray staff 578 10 8 2012 user_guide
4.配置虚拟主机、域名映射本机IP
5.通过浏览器访问域名：
Welcome to CodeIgniter!
The page you are looking at is being generated dynamically by CodeIgniter.
If you would like to edit this page you'll find it located at:
application/views/welcome_message.php
The corresponding controller for this page is found at:
application/controllers/welcome.php
If you are exploring CodeIgniter for the very first time, you should start by reading the User Guide.
$db['default']['hostname'] = 'localhost';
$db['default']['username'] = 'root';
$db['default']['password'] = '123456';
$db['default']['database'] = 'myci';
$db['default']['dbdriver'] = 'mysql';
+++++++++++ 前提 数据库的地址、用户名、密码、数据库都是已存在且正确的，真是环境不要使用管理员链接数据库即可 ++++++++++++++++++++
8.创建model层的文件
/Users/jason/project/ci/application/models
vim testModel.php
<?php
class testModel extends CI_Model{
public $db;
public function __construct(){
$this->db = $this->load->database('default', TRUE);
// parent::__construct();
}
public function Insertdata($name){
return $this->db->insert('test',array('name'=>$name));
}
public function getdata(){
return $this->db->query('select * from test limit 20')->result_array();
}
}
?>
注意：model文件的名字要和类名相同。
9.修改controller层的文件
Ray-2:controllers ray$ ls
index.html welcome.php
Ray-2:controllers ray$ pwd
/Users/jason/project/ci/application/controllers
Ray-2:controllers ray$vim welcome.php
-------------------------------------
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Welcome extends CI_Controller {
/**
* Index Page for this controller.
*
* Maps to the following URL
* http://example.com/index.php/welcome
* - or -
* http://example.com/index.php/welcome/index
* - or -
* Since this controller is set as the default controller in
* config/routes.php, it's displayed at http://example.com/
*
* So any other public methods not prefixed with an underscore will
* map to /index.php/welcome/<method_name>
* @see http://codeigniter.com/user_guide/general/urls.html
*/
public function __construct(){
parent::__construct();
$this->load->model('testModel');
}
public function index()
{
// $this->load->model('testmodel');
$data=$this->testModel->getdata();
$this->load->view('welcome_message',array('data'=>$data));
}
public function insert($name){
// $this->load->model('testmodel');
$this->testModel->Insertdata($name);
}
}
/* End of file welcome.php */
/* Location: ./application/controllers/welcome.php */
10.修改view层的文件
Ray-2:views ray$ ls
index.html welcome_message.php
Ray-2:views ray$ pwd
/Users/jason/project/ci/application/views
在默认的试图文件里面添加一下内容
<div id="container">
<h1>Welcome to CodeIgniter!</h1>
<div id="body">
<p>The page you are looking at is being generated dynamically by CodeIgniter.</p>
<p>If you would like to edit this page you'll find it located at:</p>
<code>application/views/welcome_message.php</code>
<p>The corresponding controller for this page is found at:</p>
<code>application/controllers/welcome.php</code>
<p>If you are exploring CodeIgniter for the very first time, you should start by reading the <a href="user_guide/">User Guide</a>.</p>
</div>
<p class="footer">Page rendered in <strong>{elapsed_time}</strong> seconds</p>
</div>
<div>
<?php echo '<pre>';var_dump($data);?>
</div>
</body>
</html>
11.数据库结构
test 表
字段：
id int 主键，自增
name varchar 64
12.添加测试数据
在浏览器输入 http://www.myci.com/index.php/welcome/insert/jason 回车即可
13 查看数据是否插入成功？
在浏览器输入 http://www.myci.com/ 回车。
结果已成功插入。 OK
